In opera, she is foolhardy (4)

I believe the answer is:
rash
'foolhardy' is the definition.
(synonyms)
'in opera she is' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RASH' can be found hidden inside 'opera she is'.
(Other definitions for rash that I've seen before include "Flood" , "Foolhardy about the skin infection" , "Headstrong" , "Ill-advised" , "Impulsive - eruption" .)